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      1 /*
      2  * Copyright (C) 1999 Lars Knoll (knoll (at) kde.org)
      3  *           (C) 1999 Antti Koivisto (koivisto (at) kde.org)
      4  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
      5  *
      6  * This library is free software; you can redistribute it and/or
      7  * modify it under the terms of the GNU Library General Public
      8  * License as published by the Free Software Foundation; either
      9  * version 2 of the License, or (at your option) any later version.
     10  *
     11  * This library is distributed in the hope that it will be useful,
     12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     14  * Library General Public License for more details.
     15  *
     16  * You should have received a copy of the GNU Library General Public License
     17  * along with this library; see the file COPYING.LIB.  If not, write to
     18  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     19  * Boston, MA 02110-1301, USA.
     20  *
     21  */
     22 
     23 #ifndef Text_h
     24 #define Text_h
     25 
     26 #include "core/dom/CharacterData.h"
     27 
     28 namespace blink {
     29 
     30 class ExceptionState;
     31 class RenderText;
     32 
     33 class Text : public CharacterData {
     34     DEFINE_WRAPPERTYPEINFO();
     35 public:
     36     static const unsigned defaultLengthLimit = 1 << 16;
     37 
     38     static PassRefPtrWillBeRawPtr<Text> create(Document&, const String&);
     39     static PassRefPtrWillBeRawPtr<Text> createEditingText(Document&, const String&);
     40 
     41     RenderText* renderer() const;
     42 
     43     // mergeNextSiblingNodesIfPossible() merges next sibling nodes if possible
     44     // then returns a node not merged.
     45     PassRefPtrWillBeRawPtr<Node> mergeNextSiblingNodesIfPossible();
     46     PassRefPtrWillBeRawPtr<Text> splitText(unsigned offset, ExceptionState&);
     47 
     48     // DOM Level 3: http://www.w3.org/TR/DOM-Level-3-Core/core.html#ID-1312295772
     49 
     50     String wholeText() const;
     51     PassRefPtrWillBeRawPtr<Text> replaceWholeText(const String&);
     52 
     53     void recalcTextStyle(StyleRecalcChange, Text* nextTextSibling);
     54     bool textRendererIsNeeded(const RenderStyle&, const RenderObject& parent);
     55     RenderText* createTextRenderer(RenderStyle*);
     56     void updateTextRenderer(unsigned offsetOfReplacedData, unsigned lengthOfReplacedData, RecalcStyleBehavior = DoNotRecalcStyle);
     57 
     58     virtual void attach(const AttachContext& = AttachContext()) OVERRIDE FINAL;
     59 
     60     virtual bool canContainRangeEndPoint() const OVERRIDE FINAL { return true; }
     61     virtual NodeType nodeType() const OVERRIDE;
     62 
     63 protected:
     64     Text(TreeScope& treeScope, const String& data, ConstructionType type)
     65         : CharacterData(treeScope, data, type) { }
     66 
     67 private:
     68     virtual String nodeName() const OVERRIDE;
     69     virtual PassRefPtrWillBeRawPtr<Node> cloneNode(bool deep = true) OVERRIDE FINAL;
     70 
     71     bool isTextNode() const WTF_DELETED_FUNCTION; // This will catch anyone doing an unnecessary check.
     72 
     73     bool needsWhitespaceRenderer();
     74 
     75     virtual PassRefPtrWillBeRawPtr<Text> cloneWithData(const String&);
     76 
     77 #ifndef NDEBUG
     78     virtual void formatForDebugger(char* buffer, unsigned length) const OVERRIDE;
     79 #endif
     80 };
     81 
     82 DEFINE_NODE_TYPE_CASTS(Text, isTextNode());
     83 
     84 } // namespace blink
     85 
     86 #endif // Text_h
     87